Statement/ Command
We communicate with databases through Statements. A Statement are texts that are perceived as a valid command.
It always ends with a semicolon ;
It always ends with a semicolon ;
Creating a table
TheCREATE
command is used to create a table in the database.
CREATE TABLE
Here,
CREATE TABLE
is a clause. These clauses are usually written in all capital letters. The basic statement used to create a table is:
CREATE TABLE table_name (
id INTEGER,
name TEXT,
age INTEGER
);
Let’s break down our statement:
table_name
refers to the name of the table. Table names are written in a single word. You can use underscore ( _ ) instead of space if you want to include more than one word.- The rest of the statement follows the pattern: (column_1 data_type, column_2 data_type, column_3 data_type). So our column number 1 is
id
with the data type –INTEGER
. Basically, it stores the values of data typeINTEGER
. The rest also follows column name with its associated data type. - Statements end with a semicolon
Example
CREATE TABLE jamfinity (
id INTEGER,
name TEXT,
age INTEGER
);